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WO2013043569A1 - Immunothérapie combinée à action antitumorale synergique faisant appel à des alloantigènes - Google Patents

Immunothérapie combinée à action antitumorale synergique faisant appel à des alloantigènes Download PDF

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Publication number
WO2013043569A1
WO2013043569A1 PCT/US2012/055864 US2012055864W WO2013043569A1 WO 2013043569 A1 WO2013043569 A1 WO 2013043569A1 US 2012055864 W US2012055864 W US 2012055864W WO 2013043569 A1 WO2013043569 A1 WO 2013043569A1
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Prior art keywords
cancer
ctla
antibody
gitr
ilt2
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Inventor
Alain P. ROLLAND
John Doukas
Dmitri KHARKEVITCH
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Fresh Tracks Therapeutics Inc
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Vical Inc
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Publication of WO2013043569A1 publication Critical patent/WO2013043569A1/fr
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    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
    • A61K39/00—Medicinal preparations containing antigens or antibodies
    • A61K39/395—Antibodies; Immunoglobulins; Immune serum, e.g. antilymphocytic serum
    • A61K39/39533—Antibodies; Immunoglobulins; Immune serum, e.g. antilymphocytic serum against materials from animals
    • A61K39/39558—Antibodies; Immunoglobulins; Immune serum, e.g. antilymphocytic serum against materials from animals against tumor tissues, cells, antigens
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
    • A61K39/00—Medicinal preparations containing antigens or antibodies
    • A61K39/395—Antibodies; Immunoglobulins; Immune serum, e.g. antilymphocytic serum
    • A61K39/39533—Antibodies; Immunoglobulins; Immune serum, e.g. antilymphocytic serum against materials from animals
    • A61K39/3955—Antibodies; Immunoglobulins; Immune serum, e.g. antilymphocytic serum against materials from animals against proteinaceous materials, e.g. enzymes, hormones, lymphokines
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
    • A61K31/00—Medicinal preparations containing organic active ingredients
    • A61K31/70—Carbohydrates; Sugars; Derivatives thereof
    • A61K31/7088—Compounds having three or more nucleosides or nucleotides
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
    • A61K39/00—Medicinal preparations containing antigens or antibodies
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
    • A61K45/00—Medicinal preparations containing active ingredients not provided for in groups A61K31/00 - A61K41/00
    • A61K45/06—Mixtures of active ingredients without chemical characterisation, e.g. antiphlogistics and cardiaca
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
    • A61P35/00—Antineoplastic agents
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
    • A61P35/00—Antineoplastic agents
    • A61P35/04—Antineoplastic agents specific for metastasis
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07K—PEPTIDES
    • C07K16/00—Immunoglobulins [IGs], e.g. monoclonal or polyclonal antibodies
    • C07K16/18—Immunoglobulins [IGs], e.g. monoclonal or polyclonal antibodies against material from animals or humans
    • C07K16/28—Immunoglobulins [IGs], e.g. monoclonal or polyclonal antibodies against material from animals or humans against receptors, cell surface antigens or cell surface determinants
    • C07K16/2803—Immunoglobulins [IGs], e.g. monoclonal or polyclonal antibodies against material from animals or humans against receptors, cell surface antigens or cell surface determinants against the immunoglobulin superfamily
    • C07K16/2818—Immunoglobulins [IGs], e.g. monoclonal or polyclonal antibodies against material from animals or humans against receptors, cell surface antigens or cell surface determinants against the immunoglobulin superfamily against CD28 or CD152

Definitions

  • the present invention relates to therapeutic compositions and methods for the treatment of cancer. More particularly the invention pertains to a combination use of therapeutic compositions and methods for the treatment of melanoma.
  • Immunotherapy has shown promise as a primary approach to the treatment of malignancy. Indeed, specific cancers, such as melanoma or renal cell carcinoma, are relatively more responsive to modulation of immune function, possibly because the immune system can be induced to recognize mutant gene products in these cells.
  • the immune system appears to contribute to the surveillance and destruction of neoplastic cells, by mobilization of either cellular or humoral immune effectors.
  • Cellular mediators of anti-tumor activity include MHC-restricted cytotoxic T cells, natural killer (NK) cells (R. K. Oldham, Cane. Metast. Rev. 2, 323 (1983); R. B. Herberman, Concepts Immunopathol. 1, 96 (1985)) and lymphokine-activated killer (LAK) cells (S. A. Rosenberg, Immunol. Today 9, 58 (1988)).
  • NK natural killer
  • LAK lymphokine-activated killer
  • TIL tumor infiltrating lymphocytes
  • Cytokines can also participate in the anti-tumor response, either by a direct action on cell growth or by activating cellular immunity.
  • TNF-a tumor necrosis factor-a
  • lymphotoxin M. B.
  • Interferon- ⁇ markedly increases class I MHC cell surface expression (P. Lindahl, et ah, Proc. Natl. Acad. Sci. USA 70, 2785 (1973); P. Lindahl, et al., Proc. Natl. Acad. Sci. USA 73, 1284 (1976)) and synergizes with TNF-a in producing this effect (L. J. Old, Nature 326, 330 (1987)).
  • Colony stimulating factors such as G-CSF and GM-CSF activate neutrophils and macrophages to lyse tumor cells directly (S. C.
  • LAK lymphokine activated killer cells
  • the LAK cells lyse tumor cells without preimmunization or MHC restriction (J. H. Phillips and L. L. Lanier, J. Exp. Med. 164, 814 (1986)).
  • Interleukin-4 also generates LAK cells and acts synergistically with IL-2 in the generation of tumor specific killers cells (J. J. Mule, et ah, J. Immunol. 142, 726 (1989)).
  • Reduced class I MHC expression could also facilitate growth of these tumors when transplanted into syngeneic recipients.
  • Several tumor cell lines which exhibit low levels of class I MHC proteins become less oncogenic when expression vectors encoding the relevant class I MHC antigen are introduced into them (K. Tanaka, et al, Science 228, 26 (1985); K. Hui, et al, Nature 311, 750 (1984); R. Wallich, et al, Nature 315, 301 (1985); H- G. Ljunggren and K. Karre, J. Immunogenet . 13, 141 (1986); G. J. Hammerling, et al., J. Immunogenet. 13, 153 (1986)).
  • tumor cells which express a class I MHC gene confer immunity in naive recipients against the parental tumor (K. Hui and F. Grosveld, H. Festenstein, Nature 311, 750 (1984); R. Wallich, et al, Nature 315, 301
  • the immune response to tumor cells can be stimulated by systemic administration of IL-2 (M. T. Lotze, et al, J. Immunol. 135, 2865 (1985)), or IL-2 with LAK cells (S. A. Rosenberg, et al, N. Eng. J. Med. 316, 889 (1987); C. S. Johnson, et al,
  • a bicistronic plasmid (encoding HLA-B7 heavy chain and p2-microglobulin) formulated with a cationic lipid-based system (DMRIE-DOPE), Allovectin ® , while not wishing to be bound by any particular theory,is believed to act through multiple mechanisms of action (MO A): (i) induction of anti-tumor T cells following tumor cell expression of the alloantigen HLA-B7 in HLA-B7 negative patients, (ii) induction of anti-tumor T cells following restoration of tumor MHC class I expression and antigen presentation, and (iii) recruitment of immune cells into tumors through the pro -inflammatory action of DNA-lipid complexes.
  • MO A multiple mechanisms of action
  • CTLA-4 cytotoxic T-lymphocyte antigen 4
  • CD 152 cytotoxic T-lymphocyte antigen 4
  • CTLA-4 acts to prevent hyperstimulation of T cells that could lead to harmful autoimmunity or activation-induced cell death of T cells.
  • the functional role of CTLA-4 is best demonstrated by the lethal autoimmunity observed in CTLA-4 knockout mice.
  • immunostimulatory antibody therapy as either their blockade or engagement by antibodies would be expected to reduce T cell suppression and/or activate T cells and/or other immune cells.
  • molecular targets include CD40, OX40 (CD 134), the tumor necrosis factor receptor superfamily members 9 (CD 137) and 18 (also known as glucocorticoid-induced tumor necrosis factor receptor-related protein or GITR), and the immunoglobulin-like transcript (ILT) family members ILT2 and ILT3.
  • CD40 CD 134
  • CD 137 tumor necrosis factor receptor superfamily members 9
  • GITR also known as glucocorticoid-induced tumor necrosis factor receptor-related protein or GITR
  • ILT immunoglobulin-like transcript
  • ipilimumab is a fully human anti-CTLA-4 monoclonal antibody developed by Medarex and Bristol-Myers Squibb which recently received FDA approval for use in melanoma.
  • Clinical trials for ipilimumab have also revealed a unique panel of mechanism-based immune-related adverse events. The vast majority of the immune-related adverse events are low-grade pruritus and diarrhea, while some cases of more serious colitis, hepatitis and hypophysitis also have been described.
  • the present invention provides an immunotherapeutic composition including
  • the present invention further provides an immunotherapeutic composition including (a) one or more binding components, in association with (b) one or more immunostimulatory therapeutic nucleic acid(s) capable of expressing protein(s) or peptide(s) that stimulate T-cell immunity against tissues or cells and, optionally, a pharmaceutically acceptable carrier.
  • the one or more binding component(s) is a molecule that binds with specificity to CTLA-4, PD-1, PD- Ll, PD-L2, CD40, OX40, CD137, GITR, ILT2, or ILT3, or a molecule that binds with specificity to a ligand of CTLA-4, PD-1, PD-L1, PD-L2, CD40, OX40, CD137, GITR, ILT2, or ILT3.
  • the molecule binds with specificity to a ligand of molecule that binds with specificity to a ligand of CTLA-4, PD-1, CD40, OX40, CD 137, GITR, ILT2, or ILT3.
  • a ligand of molecule that binds with specificity to a ligand of CTLA-4, PD-1, CD40, OX40, CD 137, GITR, ILT2, or ILT3.
  • Such molecules that bind with specificity may be an organic molecule, a nucleic acid molecule, or a polypeptide.
  • the present invention further provides an immuno therapeutic composition including (a) one or more binding components, wherein the one or more binding component is an antibody having specificity to CTLA-4, PD-1, PD-Ll, PD-L2, CD40, OX40, CD137, GITR, ILT2, or ILT3, or an antibody having specificity to a ligand of CTLA-4, PD-1, PD-Ll, PD-L2, CD40, OX40, CD137, GITR, ILT2, or ILT3, in association with (b) one or more immunostimulatory therapeutic nucleic acid molecule(s) capable of expressing protein(s) or peptide(s) that stimulate T-cell immunity against tissues or cells and, optionally, a
  • the antibody is an isolated fully- human monoclonal antibody.
  • the antibody binds with specificity to CTLA-4, PD-1 , or PD-Ll .
  • the antibody binds with specificity to CTLA-4.
  • the human monoclonal antibody is ipilimumab, BMS- 936558, BMS-936559, BMS-663513 or urelumab, CT-011 or pidilizumab, MK-3475, MPDL3280A or RG7446, CP-870,893, TRX518, or TRX385.
  • the protein(s) encoded by the immunostimulatory therapeutic nucleic acid molecule(s) may be a class I major histocompatibility complex (MHC) antigen, a ⁇ 2 -microglobulin, or a cytokines.
  • MHC antigen may be foreign to the subject to which the therapeutic composition is administered.
  • the MHC antigen may be HLA-B7.
  • the peptide(s) may compromise antigenic determinants of proteins expressed on tumors (tumor antigens) or proteins foreign to the host to which the therapeutic composition is administered.
  • the immunostimulatory nucleic acid molecule encodes HLA-B7 heavy chain and ⁇ 2- microglobulin.
  • the nucleic acid molecule is a plasmid encoding HLA- B7 heavy chain and ⁇ 2 -microglobulin and is formulated with DMRIE-DOPE.
  • the plasmid encoding HLA-B7 heavy chain and p2-microglobulin and is formulated with DMRIE-DOPE is Allovectin®.
  • the present invention further provides an immunotherapeutic composition containing (a) an antibody recognizing CTLA-4, PD-1, PD-Ll, PD-L2, CD40, OX40, CD137, GITR, ILT2, or ILT3, in association with (b) one or more immunostimulatory therapeutic nucleic acid(s) having coding sequences for immunostimulatory proteins or peptides such as alloantigen(s), such as HLA-B7 (alone or in combination with class I major histocompatibility complex (MHC) antigens in addition to class II MHC and blood group antigens ⁇ 2 microglobulins), and (c) a pharmaceutically acceptable carrier.
  • the antibody is an isolated fully-human monoclonal antibody.
  • the immunotherapeutic composition contains an antibody recognizing CTLA-4, and one or more immunostimulatory therapeutic nucleic acid molecules(s) having coding sequences HLA-B7 and ⁇ 2 microglobulin.
  • a binding component according to the present invention can be any binding component (e.g., an isolated fully-human monoclonal antibody) as set forth in U.S. Patent No. 8,017, 1 14 which is incorporated in its entirety herein.
  • the binding components of the present invention may be blocking ligands, macromolecules (e.g., proteins or peptides, or nucleic acid molecules) or small molecules capable of binding to CTLA-4, PD-1 , PD-L1 , PD-L2, CD40, OX40, CD137, GITR, ILT2, or ILT3 and by way of this binding (e.g., through physical or steric effects) enhancing the activation of T cells or other immune cells.
  • An alloantigen according to the present invention may comprise class I major histocompatibility complex (MHC) antigens, as set forth in U.S. Patent No. 5,910,488 which is incorporated in its entirety herein.
  • MHC major histocompatibility complex
  • the invention also provides the immunostimulatory therapeutic nucleic acid molecules(s) optionally formulated with a pharmaceutical composition containing a transfer- facilitating vehicle.
  • the vehicle may comprise a transfection-facilitating cationic lipid formulation.
  • the cationic lipid formulation may be DMRIE-DOPE.
  • the invention further provides a method for treating a disorder, in an subject, characterized as being responsive to the stimulation of T-cell immunity, including the step of administering a vector into tissue or cells of the subject, wherein the vector comprises genetic material encoding one or more cistrons capable of expressing one or more proteins or peptides that stimulate T-cell immunity against the tissue or cells, such that the protein or proteins or peptide or peptides are expressed resulting in the treatment of the disorder followed by the administration of a binding agent.
  • the invention further provides a method for treating a disorder, in an subject, characterized as being responsive to the stimulation of T-cell immunity, including the administering a vector into tissue or cells of the subject, wherein the vector comprises genetic material encoding one or more cistrons capable of expressing one or more proteins or peptides that stimulate T-cell immunity against the tissue or cells, such that the protein or proteins or peptide or peptides are expressed to elicit an immune response and the
  • a binding agent such as any humanized antibody recognizing CTLA-4, PD- 1 , PD-L1 , PD-L2, CD40, OX40, CD 137, GITR, ILT2, or ILT3.
  • the disorder treated by a method of the present invention is cancer.
  • the cancer is selected from the group consisting of melanoma, squamous cell carcinoma, basal cell carcinoma, breast cancer, head and neck carcinoma, thyroid carcinoma, soft tissue sarcoma, bone sarcoma, testicular cancer, prostatic cancer, ovarian cancer, bladder cancer, skin cancer, brain cancer, angiosarcoma,
  • the cancer is melanoma, squamous cell carcinoma, or basal cell carcinoma. In particular embodiments, the cancer is melanoma.
  • An embodiment of the present invention includes a method for treating or preventing a medical condition in a subject (e.g., of melanoma, squamous cell carcinoma, breast cancer, head and neck carcinoma, thyroid carcinoma, soft tissue sarcoma, bone sarcoma, testicular cancer, prostatic cancer, ovarian cancer, bladder cancer, skin cancer, brain cancer, angiosarcoma, hemangiosarcoma, mast cell tumor, primary hepatic cancer, lung cancer, pancreatic cancer, gastrointestinal cancer, renal cell carcinoma, hematopoietic neoplasia, and metastatic cancer thereof.) including administering a composition including: (a) a therapeutically effective amount of one or more binding components such as any antibody recognizing CTLA-4, PD-1, PD-Ll, PD-L2, CD40, OX40, CD137, GITR, ILT2, or ILT3, preferably an isolated fully-human monoclonal antibody, in association with (b) a therapeutically effective
  • the present invention also provides a kit including (a) one or more binding components such as any antibody recognizing CTLA-4, PD-1, PD-Ll, PD-L2, CD40, OX40, CD137, GITR, ILT2, or ILT3; in association with (b) one or more immunostimulatory therapeutic nucleic acid(s) capable of expressing protein(s) or peptide(s) that stimulate T-cell immunity against tissues or cells formulated in a pharmaceutically acceptable carrier.
  • the protein(s) or peptides may comprise class I major histocompatibility complex (MHC) antigens, p2-microglobulins, or cytokines.
  • MHC antigen may be foreign to the subject.
  • the MHC antigen may be HLA-B7.
  • the binding component can be in a separate container from the vector.
  • the kit contains a first container including a controlled release formulation of an antibody selected from the group consisting of ipilimumab, BMS- 936558, BMS-936559, BMS-663513 or urelumab, CT-011 or pidilizumab, MK-3475, MPDL3280A or RG7446, CP-870,893, TRX518, or TRX385, in which the formulation contains an amount of antibody effective to treat or reduce and/or prevent melanoma, and a second container containing an immunostimulatory therapeutic nucleic acid molecule and a pharmaceutically acceptable carrier.
  • a controlled release formulation of an antibody selected from the group consisting of ipilimumab, BMS- 936558, BMS-936559, BMS-663513 or urelumab, CT-011 or pidilizumab, MK-3475, MPDL3280A or RG7446, CP-870,893, TRX518, or TRX385, in which the
  • the immunostimulatory therapeutic nucleic acid molecule and pharmaceutically acceptable carrier are a controlled release formulation of a plasmid encoding HLA-B7 heavy chain and p2-microglobulin, formulated with DMRIE-DOPE in an amount effective to treat or reduce and/or prevent melanoma.
  • the kits may further include a puncture needle or catheter. Any of the kits may also contain a package insert.
  • Figure 1 presents mean tumor volumes over time for Groups 1-4, and illustrates the anti-tumor effect of the immunotherapeutic composition treatment.
  • Figure 2 represents the relationship of tumor volume between Groups 1-4.
  • Figure 3 graphically displays the survival curves for Groups 1-4.
  • the present invention provides synergistic combinations of immunotherapies and methods for treating disorders or medical conditions that are characterized by a down- regulation of MHC class I, such as cancer.
  • the immunotherapeutic compositions of the invention which can be used to treat the medical conditions, include one or more fully- human monoclonal antibodies recognizing CTLA-4, PD-1, PD-L1, PD-L2, CD40, OX40, CD137, GITR, ILT2, or ILT3, such as but not limited to ipilimumab in association with one or more immunostimulatory therapeutic nucleic acid(s), capable of expressing protein(s) or peptide(s) that stimulate T-cell immunity against tissues or cells formulated in a
  • the protein(s) or peptides may comprise class I major histocompatibility complex (MHC) antigens, ⁇ 2- microglobulins, or cytokines.
  • MHC antigen may be foreign to the subject to which the immunotherapeutic composition is administered.
  • the MHC antigen may be HLA-B7.
  • immunotherapeutic compositions include the binding component and the immunostimulatory therapeutic nucleic acid component "in association" with one another.
  • the term "in association” indicates that the components of the
  • compositions of the present invention can be formulated into a single composition for simultaneous delivery or formulated separately into two or more compositions (e.g., a kit). Furthermore, each component of the pharmaceutical composition of the invention can be administered to a subject at the same time in concomitant injections (separate) or at a different time than when the other component is administered (sequential injections (in any order)); for example, each administration may be given non-simultaneously at several intervals over a given period of time.
  • the immunostimulatory therapeutic nucleic acid component is administered first according to the preferred recommended dose and schedule, which is weekly for six weeks followed by a rest period of two to three weeks, followed by the administration of the binding component according to the recommended dose and schedule, which for example for ipilimumab is 3 mg/kg as an intravenous infusion every 3 weeks for a total of four doses.
  • the separate components may be administered to a subject by the same or by a different route (e.g., intratumoral, intravenous).
  • the immunotherapeutic compositions and methods of use of the invention provide a particularly effective means for treating diseases marked by reduced expression of MHC molecules.
  • the Examples described below demonstrate that the therapeutic efficacy of both the binding component and the immunostimulatory therapeutic nucleic acid component of the invention when administered in association demonstrate synergy.
  • “Synergy” and variations thereof refer to activity (e.g., immunostimulatory activity) of administering a combination of compounds that is greater than the additive activity of the compounds if administered individually.
  • an "immunostimulatory therapeutic molecule” is any molecule
  • an "immunostimulatory therapeutic nucleic acid” is a subset of an immunostimulatory therapeutic molecule and is any expression vector that when administered to a patient expresses protein(s) or peptide(s) that stimulate the patient's immune system for the purpose of treating a disease (e.g., a cancer or infectious disease).
  • the invention relates to an immunostimulatory therapeutic nucleic acid or expression vector having the coding sequences of one or more alloantigen(s) with or without the coding sequence of one or more accessory molecules.
  • the expression vector is a bicistronic plasmid encoding human HLA-B7 heavy chain and chimpanzee p2-microglobulin as disclosed in U.S. Patent No. 5,910,488, which is hereby incorporated herein in its entirety.
  • a coding sequence is "under the control of, "functionally associated with” or
  • R A polymerase mediated transcription of the coding sequence into R A preferably mR A
  • R A preferably mR A
  • trans-RNA spliced if it contains introns
  • translated into a protein encoded by the coding sequence if it contains introns
  • express and "expression” mean allowing or causing the information in a gene, RNA or DNA sequence to become manifest; for example, producing a protein by activating the cellular functions involved in transcription and translation of a corresponding gene.
  • a DNA sequence is expressed in or by a cell to form an "expression product” such as an RNA (e.g., mRNA) or a protein.
  • the expression product itself may also be said to be “expressed” by the cell.
  • vector means the vehicle
  • Vectors may contain nucleic acid molecules encoding one or more proteins or peptides.
  • the vector is a plasmid.
  • subject refers to any individual or patient to which the subject methods are performed. Generally the subject is human, although as will be appreciated by those in the art, the subject may be an animal. Thus other animals, including mammals such as rodents (including mice, rats, hamsters and guinea pigs), cats, dogs, rabbits, farm animals including cows, horses, goats, sheep, pigs, etc., and primates (including monkeys, chimpanzees, orangutans and gorillas) are included within the definition of subject.
  • rodents including mice, rats, hamsters and guinea pigs
  • cats dogs, rabbits, farm animals including cows, horses, goats, sheep, pigs, etc.
  • primates including monkeys, chimpanzees, orangutans and gorillas
  • CTLA-4 (CD 152) is expressed on T cells.
  • CD 152 binds to CD80 or
  • CD86 (e.g., as expressed on antigen presenting cells), a T cell inhibitory signal is generated.
  • CD28 also expressed by T cells, likewise binds to CD80 and CD86, however this binding leads to the opposite effect, the generation of a T cell activation signal.
  • Blocking CD 152 activity for example with neutralizing antibodies, therefore favors T cell activation in two ways. First, it reduces or eliminates the generation of a T cell inhibitory signal. Second, by freeing CD80 and CD86 to bind to CD28, it enhances the opportunity for delivery of T cell activation signals.
  • PD-1 (CD279) expressed on activated T cells, B cells, and macrophages is capable of down-regulating T cell activation.
  • the primary binding partners for PD-1 are PD-L1 (CD274) and PD-L2 (CD273).
  • PD-L1 is constitutively expressed on many cell types, including tumor cells, whereas PD-L2 is inducible on dendritic cells, T cells and B cells.
  • Engagement of PD-1 by PD-L1 or PD-L2 negatively regulates immune responses in a manner similar to but distinct from that produced following CTLA-4 binding to CD80 or CD86 (in part based on distinct expression patterns between these molecules).
  • CTLA-4 PD-L1 is also capable of binding CD80, and therefore through competition for CD80 binding PD-L1 may also reduce CD28-mediated costimulatory signals.
  • ILT2 and ILT3 whose ligands include MHC class I molecules.
  • Blocking ILT2 and ILT3 binding should enhance T cell activation and/or survival in a manner analogous to blocking CTLA-4, PD-1, PD-L1, or PD-L2.
  • engagement of immunostimulatory molecules e.g., by agonist monoclonal antibodies
  • these latter molecules include CD40, OX40, CD 137, and GITR.
  • the binding component of the immunotherapeutic composition of the present invention includes any composition which binds specifically to a molecule that regulates the activity of immune cells, such as, but not limited antibodies recognizing CTLA-4, PD-1, PD- Ll, PD-L2, CD40, OX40, CD137, GITR, ILT2, or ILT3.
  • a molecule that regulates the activity of immune cells such as, but not limited antibodies recognizing CTLA-4, PD-1, PD- Ll, PD-L2, CD40, OX40, CD137, GITR, ILT2, or ILT3.
  • anti- CTLA-4 antibody ipilimumab marketed by Bristol-Meyers Squibb as Yervoy ®
  • the anti-PD- 1 antibody BMS-936558 under development by Bristol-Meyers Squibb, and also known as MDX-1106 or ONO-4538
  • the anti-PD-1 antibody CT-01 1 or pidilizumab under
  • the anti-PD-1 antibody MK-3475 under development by Merck, and also known as SCH 900475
  • the anti-PD-Ll antibody BMS-936559 under development by Bristol-Meyers Squibb, and also known as MDX-1105
  • MPDL3280A or RG7446 under development by Genentech/Roche
  • the anti-CD 137 monoclonal antibody BMS-663513 or urelumab under development by Bristol-Meyers Squibb
  • the anti-CD40 agonist monoclonal antibody CP-870,893 under development by Pfizer
  • the anti-GITR antibody TRX518 previously under development by Tolerx
  • the anti-ILT3 antibody TRX385 (formerly under development by Tolerx).
  • a binding component or agent refers to a molecule that binds with specificity to an immunoregulatory molecule such as but not limited to CTLA-4, PD-1, PD-L1, PD-L2, CD40, OX40, CD137, GITR, ILT2, or ILT3, e.g., in a ligand-receptor type fashion or an antibody-antigen interaction e.g., proteins which specifically associate with an immunoregulatory molecule such as but not limited to CTLA-4, PD-1, PD-L1, PD-L2, CD40, OX40, CD137, GITR, ILT2, or ILT3, e.g., in a ligand-receptor type fashion or an antibody-antigen interaction e.g., proteins which specifically associate with an immunoregulatory molecule such as but not limited to CTLA-4, PD-1, PD-L1, PD-L2, CD40, OX40, CD137, GITR, ILT2, or ILT3, e.g.,
  • binding component includes small organic molecules, nucleic acids and polypeptides, such as a full antibody (preferably an isolated human monoclonal antibody) or antigen-binding fragment thereof of the present invention.
  • the binding component of the present invention is ipilimumab a fully human anti-CTLA-4 monoclonal antibody (also known as 10D1 as disclosed in U.S. Patent No. 8,017,144, which is hereby incorporated herein in its entirety) approved by the FDA for use in melanoma and marketed as Yervoy.
  • CTLA-4, PD-1, PD-L1, PD-L2, CD40, OX40, CD137, GITR, ILT2, or ILT3 activity could be blocked or enhanced in ways other than by the use of neutralizing antibodies.
  • These blocking ligands for example, could be based on CD80 or CD86 but lacking in their ability to trigger CD 152 signaling. In this case, it would be preferable if these blocking ligands were not capable of binding CD28, so as to preserve functioning of the CD28-mediated T cell activation pathway.
  • CD28 agonists e.g., antibodies or macromolecules such as proteins or peptides or small molecules that trigger the appropriate cell signaling. Selection of the proper agonist would be important, as some CD28 agonists ⁇ e.g., so-called
  • Immune activation can also be triggered through the interaction of CD40 and
  • CD40 also known as CD40 ligand or CD40L.
  • CD40 is expressed by antigen presenting cells (e.g., macrophages) and CD154 by T cells, and their interaction leads to the activation of the CD40-expressing cell. Therefore, administration of an immunostimulatory therapeutic nucleic acid, such as but not limited to Allovectin ® along with immunomodulators that lead to enhanced CD40-CD154 signaling would lead to increased immune activation and as a result increased anti-tumor activity.
  • an immunostimulatory therapeutic nucleic acid such as but not limited to Allovectin ® along with immunomodulators that lead to enhanced CD40-CD154 signaling would lead to increased immune activation and as a result increased anti-tumor activity.
  • immunomodulators could include CD40 ligands, for example macromolecules ⁇ e.g., proteins or peptides) or small molecules based on CD 154 that are capable of binding to and triggering cell signaling by CD40 or agonist monoclonal antibodies capable of binding to and signaling through CD40 .
  • CD40 ligands for example macromolecules ⁇ e.g., proteins or peptides
  • small molecules based on CD 154 that are capable of binding to and triggering cell signaling by CD40 or agonist monoclonal antibodies capable of binding to and signaling through CD40 .
  • a similar approach could also be taken to enhance immune activation triggered through OX40 and its ligand OX40L, or CD 137 and its ligand CD137L, or GITR and its ligand GITRL, through the administration of immunomodulators specific for these molecules (such as OX40L, or CD137L or GITRL, or macromolecules such as peptides or agonist monoclonal antibodies that are capable of binding to and signaling through OX40 or CD 137 or GITR).
  • immunomodulators specific for these molecules such as OX40L, or CD137L or GITRL, or macromolecules such as peptides or agonist monoclonal antibodies that are capable of binding to and signaling through OX40 or CD 137 or GITR.
  • Dosage regimens are adjusted to provide the optimum desired response (e.g., a therapeutic response). For example, a single bolus may be administered, several divided doses may be administered over time or the dose may be proportionally reduced or increased as indicated by the exigencies of the therapeutic situation. It is especially advantageous to formulate parenteral compositions in dosage unit form for ease of administration and uniformity of dosage.
  • Dosage unit form as used herein refers to physically discrete units suited as unitary dosages for the subjects to be treated; each unit contains a predetermined quantity of active compound calculated to produce the desired therapeutic effect in association with the required pharmaceutical carrier.
  • the dosage unit forms of the binding components are dictated by and directly dependent on (a) the unique characteristics of the binding component and the particular therapeutic effect to be achieved, and (b) the limitations inherent in the art of compounding such a binding component for the treatment of sensitivity in individuals.
  • antioxidants examples include: (1) water soluble antioxidants, such as ascorbic acid, cysteine hydrochloride, sodium bisulfate, sodium metabisulfite, sodium sulfite and the like; (2) oil-soluble antioxidants, such as ascorbyl palmitate, butylated hydroxyanisole (BHA), butylated hydroxytoluene (BHT), lecithin, propyl gallate, alpha-tocopherol, and the like; and (3) metal chelating agents, such as citric acid, ethylenediamine tetraacetic acid (EDTA), sorbitol, tartaric acid, phosphoric acid, and the like.
  • water soluble antioxidants such as ascorbic acid, cysteine hydrochloride, sodium bisulfate, sodium metabisulfite, sodium sulfite and the like
  • oil-soluble antioxidants such as ascorbyl palmitate, butylated hydroxyanisole (BHA), butylated hydroxytoluene (BHT), le
  • the binding components which may be used in a suitable hydrated form are formulated into pharmaceutically acceptable dosage forms by conventional methods known to those of skill in the art.
  • Actual dosage levels of the binding components of the present invention can be varied so as to obtain an amount of the binding component which is effective to achieve the desired therapeutic response for a particular patient, receiving the immunotherapeutic composition, and mode of administration, without being toxic to the patient.
  • the selected dosage level depends upon a variety of pharmacokinetic factors including the activity of the particular binding components employed, or the ester, salt or amide thereof, the route of administration, the time of administration, the rate of excretion of the particular binding components being employed, the duration of the treatment, the immunostimulatory therapeutic nucleic acid used in combination with the particular binding components employed, the age, sex, weight, condition, general health and prior medical history of the patient being treated, and like factors.
  • a physician or veterinarian can start doses of the binding components employed in the pharmaceutical composition at levels lower than that required to achieve the desired therapeutic effect and gradually increase the dosage until the desired effect is achieved.
  • a suitable daily dose of a binding component is that amount of the binding component which is the lowest dose effective to produce a therapeutic effect.
  • Such an effective dose generally depends upon the factors described above. It is preferred that administration be intravenous, intramuscular, intraperitoneal, intratumoral, or subcutaneous, or administered proximal to the site of the target. If desired, the effective daily dose of binding components can be administered as two, three, four, five, six or more sub-doses administered separately at appropriate intervals throughout the day, optionally, in unit dosage forms.
  • Effective doses of the binding components, for the treatment of immune- related conditions and diseases described herein vary depending upon many different factors, including means of administration, target site, physiological state of the patient, whether the patient is human or an animal, other medications administered, and whether treatment is prophylactic or therapeutic. Treatment dosages need to be titrated to optimize safety and efficacy.
  • the dosage ranges from about 0.0001 to
  • an exemplary treatment regime entails administration once per every two weeks or once a month or once every 3 to 6 months.
  • the administration of the antibody is according to the recommended dose and schedule, which for example for ipilimumab is 3 mg/kg as an intravenous infusion every 3 weeks for a total of four doses.
  • two or more monoclonal antibodies with different binding specificities are administered simultaneously, in which case the dosage of each antibody administered falls within the ranges indicated.
  • Antibody or antibodies are usually administered on multiple occasions. Intervals between single dosages can be weekly, monthly or yearly. Intervals can also be irregular as indicated by measuring blood levels of monoclonal antibodies in the patient. In some methods, dosage is adjusted to achieve a plasma antibody concentration of 1-1000 ⁇ g/ml and in some methods 25-300 ⁇ g/ml. Alternatively, antibody or antibodies can be administered as a sustained release formulation, in which case less frequent administration is required. Dosage and frequency vary depending on the half-life of the antibody or antibodies in the patient. In general, human antibodies show the longest half life, followed by humanized antibodies, chimeric antibodies, and nonhuman antibodies. The dosage and frequency of administration can vary depending on whether the treatment is prophylactic or therapeutic.
  • a relatively low dosage is administered at relatively infrequent intervals over a long period of time. Some patients continue to receive treatment for the rest of their lives.
  • a relatively high dosage at relatively short intervals is sometimes required until progression of the disease is reduced or terminated, and preferably until the patient shows partial or complete amelioration of symptoms of disease. Thereafter, the patent can be administered a prophylactic regime.
  • Some human sequence antibodies and human monoclonal antibodies of the invention can be formulated to ensure proper distribution in vivo.
  • the blood- brain barrier excludes many highly hydrophilic compounds.
  • the therapeutic compounds of the invention cross the BBB (if desired)
  • they can be formulated, for example, in liposomes.
  • liposomes For methods of manufacturing liposomes, See, e.g., U.S. Pat. Nos. 4,522,811; 5,374,548; and 5,399,331.
  • the liposomes may comprise one or more moieties which are selectively transported into specific cells or organs, thus enhance targeted drug delivery (See, e.g., V. V. Ranade, J. Clin. Pharmacol. 29:685 (1989)).
  • Exemplary targeting moieties include folate or biotin (See, e.g., U.S. Pat. No. 5,416,016 to Low et al ; mannosides (Umezawa, et al., Biochem. Biophys. Res. Commun. 153: 1038 (1988));
  • the binding components of the immunotherapeutic invention are formulated in liposomes; in a more preferred embodiment, the liposomes include a targeting moiety.
  • the binding component in the liposomes are delivered by bolus injection to a site proximal to the tumor or infection.
  • the composition should be fluid to the extent that easy syringability exists. It should be stable under the conditions of manufacture and storage and should be preserved against the contaminating action of microorganisms such as bacteria and fungi.
  • the binding components are administered to a patient suffering from established disease in an amount sufficient to arrest or inhibit further development or reverse or eliminate, the disease, its symptoms or biochemical markers.
  • the pharmaceutical compositions are administered to a patient susceptible or at risk of a disease in an amount sufficient to delay, inhibit or prevent development of the disease, its symptoms and biochemical markers. An amount adequate to accomplish this is defined as a "therapeutically-" or “prophylactically-effective dose.” Dosage depends on the disease being treated, the subject's size, the severity of the subject's symptoms, and the particular composition or route of administration selected.
  • a "therapeutically effective dosage” in treatment of tumors, can inhibit tumor growth by at least about 20%, or at least about 40%, or at least about 60%, or at least about 80% relative to untreated subjects.
  • the ability of a compound to inhibit cancer can be evaluated in an animal model system predictive of efficacy in human tumors.
  • this property of a binding component can be evaluated by examining the ability of the binding component to inhibit by conventional assays in vitro.
  • a therapeutically effective amount of a binding component can decrease tumor size, or otherwise ameliorate symptoms in a subject.
  • reduced levels of monoclonals can be used with Allovectin, thereby reducing the risk of monoclonal-induced toxicity but still offering synergistic anti-tumor responses.
  • the binding component should be sterile and fluid to the extent that the binding component is deliverable by syringe.
  • the carrier can be an isotonic buffered saline solution, ethanol, polyol (for example, glycerol, propylene glycol, and liquid polyetheylene glycol, and the like), and suitable mixtures thereof. Proper fluidity can be maintained, for example, by use of coating such as lecithin, by maintenance of required particle size in the case of dispersion and by use of surfactants.
  • isotonic agents for example, sugars, polyalcohols such as mannitol or sorbitol, and sodium chloride in the composition. Long-term absorption of the injectable binding components can be brought about by including in the binding component an agent which delays absorption, for example, aluminum monostearate or gelatin.
  • Pharmaceutically acceptable carriers include solvents, dispersion media, coatings, antibacterial and antifungal agents, isotonic and absorption delaying agents, and the like that are physiologically compatible.
  • the carrier can be suitable for intravenous, intramuscular, subcutaneous, parenteral, spinal or epidermal administration (e.g., by injection or infusion).
  • the binding component i.e., antibody, bispecific and multispecific molecule, may be coated in a material to protect the binding component from the action of acids and other natural conditions that may inactivate the compound.
  • a "pharmaceutically acceptable salt” refers to a salt that retains the desired biological activity of the binding component and does not impart any undesired toxicological effects (See, e.g., Berge, S. M., et al., J. Pharm. Sci. 66: 1-19(1977)).
  • Examples of such salts include acid addition salts and base addition salts.
  • Acid addition salts include those derived from nontoxic inorganic acids, such as hydrochloric, nitric, phosphoric, sulfuric,
  • Base addition salts include those derived from alkaline earth metals, such as sodium, potassium, magnesium, calcium and the like, as well as from nontoxic organic amines, such as
  • a binding component of the present invention can be administered by a variety of methods known in the art.
  • the route and/or mode of administration vary depending upon the desired results.
  • the binding component can be prepared with carriers that protect the compound against rapid release, such as a controlled release formulation, including implants, transdermal patches, and microencapsulated delivery systems.
  • Biodegradable, biocompatible polymers can be used, such as ethylene vinyl acetate, polyanhydrides, polyglycolic acid, collagen, polyorthoesters, and polylactic acid. Many methods for the preparation of such formulations are described by e.g., Sustained and Controlled Release Drug Delivery Systems, J. R. Robinson, ed., Marcel Dekker, Inc., New York, 1978. Pharmaceutical compositions are preferably manufactured under GMP conditions.
  • binding component of the invention may be necessary to coat the binding component with, or co-administer the binding component with, a material to prevent its inactivation.
  • the binding component may be administered to a subject in an appropriate carrier, for example, liposomes, or a diluent.
  • Pharmaceutically acceptable diluents include saline and aqueous buffer solutions.
  • Liposomes include water-in-oil-in-water CGF emulsions as well as conventional liposomes (Strejan, et al., J. Neuroimmunol. 7:27(1984)).
  • Pharmaceutically acceptable carriers include sterile aqueous solutions or dispersions and sterile powders for the extemporaneous preparation of sterile injectable solutions or dispersion.
  • sterile aqueous solutions or dispersions and sterile powders for the extemporaneous preparation of sterile injectable solutions or dispersion.
  • the use of such media and agents for pharmaceutically active substances is known in the art. Except insofar as any conventional media or agent is incompatible with the binding component, use thereof with the binding components of the invention is contemplated.
  • Sterile injectable solutions can be prepared by incorporating the binding component in the required amount in an appropriate solvent with one or a combination of ingredients enumerated above, as required, followed by sterilization microfiltration.
  • dispersions are prepared by incorporating the active compound into a sterile vehicle that contains a basic dispersion medium and the required other ingredients from those enumerated above.
  • a sterile vehicle that contains a basic dispersion medium and the required other ingredients from those enumerated above.
  • the preferred methods of preparation are vacuum drying and freeze-drying
  • Binding components can also be administered with medical devices known in the art.
  • a binding component of the immunotherapeutic composition of the invention can be administered with a needleless hypodermic injection device, such as the devices disclosed in, e.g., U.S. Pat. No. 5,399,163, 5,383,851, 5,312,335, 5,064,413, 4,941,880, 4,790,824, or 4,596,556.
  • a needleless hypodermic injection device such as the devices disclosed in, e.g., U.S. Pat. No. 5,399,163, 5,383,851, 5,312,335, 5,064,413, 4,941,880, 4,790,824, or 4,596,556.
  • implants and modules useful in the present invention include: U.S. Pat. No.
  • formulations include those suitable for oral, nasal, topical (including buccal and sublingual), rectal, vaginal and/or parenteral
  • the formulations can conveniently be presented in unit dosage form and may be prepared by any methods known in the art of pharmacy.
  • the amount of binding component which can be combined with a carrier material to produce a single dosage form vary depending upon the subject being treated, and the particular mode of administration.
  • the amount of binding component which can be combined with a carrier material to produce a single dosage form generally be that amount of the binding component which produces a therapeutic effect. Generally, out of one hundred percent, this amount range from about 0.01 percent to about ninety-nine percent of active ingredient, from about 0.1 percent to about 70 percent, or from about 1 percent to about 30 percent.
  • parenteral administration and “administered parenterally” mean modes of administration other than enteral and topical administration, usually by injection, and includes, without limitation, intravenous, intratumoral, intramuscular, intraarterial, intrathecal, intracapsular, intraorbital, intracardiac, intradermal, intraperitoneal, transtracheal, subcutaneous, subcuticular, intraarticular, subcapsular, subarachnoid, intraspinal, epidural and intrasternal injection and infusion.
  • aqueous and nonaqueous carriers examples include water, ethanol, polyols (such as glycerol, propylene glycol, polyethylene glycol, and the like), and suitable mixtures thereof, vegetable oils, such as olive oil, and injectable organic esters, such as ethyl oleate.
  • polyols such as glycerol, propylene glycol, polyethylene glycol, and the like
  • vegetable oils such as olive oil
  • injectable organic esters such as ethyl oleate.
  • Proper fluidity can be maintained, for example, by the use of coating materials, such as lecithin, by the maintenance of the required particle size in the case of dispersions, and by the use of surfactants.
  • compositions may also contain adjuvants such as preservatives, wetting agents, emulsifying agents and dispersing agents. Prevention of presence of microorganisms may be ensured both by sterilization procedures, supra, and by the inclusion of various antibacterial and antifungal agents, for example, paraben, chlorobutanol, phenol sorbic acid, and the like. It may also be desirable to include isotonic agents, such as sugars, sodium chloride, and the like into the compositions. In addition, prolonged absorption of the injectable pharmaceutical form may be brought about by the inclusion of agents which delay absorption such as aluminum monostearate and gelatin. II. Immunostimulatory Therapeutic Nucleic Acid Component and Delivery
  • the immunostimulatory therapeutic nucleic acid component is capable of expressing alloantigen(s) that stimulate T-cell immunity against tissues or cells.
  • the expressed alloantigen may comprise class I or class II major
  • MHC antigens may be foreign to the subject.
  • the MHC antigen may be HLA-B7.
  • the alloantigen may also compromise blood group antigens.
  • the immunostimulatory nucleic acid component could be capable of expressing protein(s) or peptide(s) that could serve to restore or stimulate or enhance immune functioning, such as ⁇ 2 microglobulins or cytokines.
  • cytokines such as IFN- ⁇ and TNF are capable of increasing MHC expression, as well as stimulating immune cell activity.
  • the expression produces a result selected from alleviation of the cancer, reduction of size of a tumor associated with the cancer, elimination of a tumor associated with the cancer, prevention of metastatic cancer, prevention of the cancer and stimulation of effector cell immunity against the cancer.
  • the immunostimulatory therapeutic nucleic acid component of the present invention is composed of a bicistronic plasmid (preferably encoding HLA-B7 heavy chain and p2-microglobulin) formulated with a cationic lipid-based system (DMRIE-DOPE), also known as Allovectin ® .
  • DMRIE-DOPE cationic lipid-based system
  • Allovectin ® is believed to act through multiple mechanisms of action (MO A): (i) induction of anti-tumor T cells following tumor cell expression of the alloantigen HLA-B7 in HLA-B7 negative patients, (ii) induction of anti-tumor T cells following restoration of tumor MHC class I expression and antigen presentation, and (iii) recruitment of immune cells into tumors through the pro-inflammatory action of DNA-lipid complexes. Generation of anti-tumor T cells drives the destruction of not only those tumor sites directly injected with Allovectin ® , but also distal lesions and metastases.
  • MO A multiple mechanisms of action
  • the transfer of the optimized immunostimulatory therapeutic nucleic acid component provided herein into cells or tissues of subjects may be accomplished by injecting naked DNA or facilitated by using vehicles, such as, for example, viral vectors, ligand-DNA conjugates, adenovirus-ligand-DNA conjugates, calcium phosphate, and liposomes. Transfer procedures are art-known, such as, for example, transfection methods using liposomes and infection protocols using viral vectors, including retrovirus vectors, adenovirus vectors, adeno-associated virus vectors, herpes virus vectors, vaccinia virus vectors, polio virus vectors, and Sindbis and other RNA virus vectors.
  • vehicles such as, for example, viral vectors, ligand-DNA conjugates, adenovirus-ligand-DNA conjugates, calcium phosphate, and liposomes. Transfer procedures are art-known, such as, for example, transfection methods using liposomes and infection protocols using viral vectors, including retrovirus vectors, adenovirus vectors
  • the immunostimulatory therapeutic nucleic acid component provided herein are complexed with cationic liposomes or lipid vesicles.
  • Cationic or positively charged liposomes are formulations of cationic lipids (CLs) in combination with other lipids.
  • the formulations may be prepared from a mixture of positively charged lipids, negatively charged lipids, neutral lipids and cholesterol or a similar sterol.
  • the positively charged lipid can be one of the cationic lipids, such as DMRIE, described in U.S. Patent No. 5,264,618, which is hereby incorporated by reference, or one of the cationic lipids DOTMA, DOTAP, or analogues thereof, or a combination of these.
  • the cationic lipid may be GAP-DMORIE in combination with a co-lipid as described in U.S. Patent No. 6,586,409.
  • DMRIE is l ,2-dimyristyloxypropyl-3- dimethylhydroxyethyl ammonium bromide (see, e.g., J. Feigner, et al., J. Biol. Chem., 269, 1 (1994)) and is preferred.
  • Neutral and negatively charged lipids can be any of the natural or synthetic phospholipids or mono-, di-, or triacyl glycerols.
  • the natural phospholipids may be derived from animal and plant sources, such as phosphatidylcholine, phosphatidylethanolamine, sphingomyelin, phosphatidylserine, or phosphatidylinositol.
  • Synthetic phospholipids may be those having identical fatty acid groups, including, but not limited to,
  • dimyristoylphosphatidylcholine dioleoylphosphatidylcholine
  • the neutral lipid can be phosphatidylcholine, cardiolipin, phosphatidylethanolamine, mono-, di- or triacylglycerols, or analogues thereof, such as dioleoylphosphatidylethanolamine (DOPE), which is preferred.
  • DOPE dioleoylphosphatidylethanolamine
  • the negatively charged lipid can be phosphatidylglycerol, phosphatidic acid or a similar phospholipid analog.
  • lipids such as cholesterol, glycolipids, fatty acids, sphingolipids, prostaglandins, gangliosides, neobee, niosomes, oranyothernatural or synthetic amphophiles can also be used in liposome formulations, as is conventionally known for the preparation of liposomes.
  • Substitution of the cationic lipid component of liposomes can alter transfection efficiencies. Specifically, modification of the cationic species appears to be an important determinant in this process.
  • a new formulation of cationic lipids is preferred in which a different cationic lipid, l,2-dimyristyloxypropyyl-3-dimethylhydroxyetheyl ammonium bromide (DMRIE), is utilized with dioleoyl phosphatidylethanolamine (DOPE).
  • DMRIE dioleoyl phosphatidylethanolamine
  • This formulation has two properties which make it more suitable for transfections. First, it shows up to about a 7-fold increase in improved transfection efficiency compared to the formulation DC-cholesterol/DOPE in vitro.
  • this DMRIE/DOPE formulation does not aggregate at high concentrations, in contrast to the DC-Choi liposome. This characteristic thus allows higher absolute concentrations of DNA and liposomes to be introduced into experimental animals without toxicity. Because of these properties, it now becomes possible to introduce 100-1000 times more DNA which could markedly improve gene expression in vivo.
  • a preferred molar ratio of DMRIE to DOPE is from about 9/1 to 1/9; a molar ratio of about 5:5 is particularly preferred.
  • the lipid compositions can be used to facilitate the intracellular delivery of genetic material coding for therapeutically or immunogenically active proteins or peptides.
  • such methods include the steps of preparing lipid vesicles composed of cationic lipids and using these lipid vesicles to mediate the transfection or transport of therapeutically or immunogenically active agents into the cells.
  • the intracellular transport may be accomplished by incorporating or encapsulating the agent in the lipid vesicle and contacting the cell with the lipid vesicles, as in conventional liposome methodology; or alternatively, by contacting the cells
  • the agent is taken up by the cell.
  • the contacting step may occur in vitro or in vivo.
  • Such methods may be applied in the treatment of a disorder in an subject, including the step of administering a preparation having a cationic lipid formulation together with a pharmaceutically effective amount of immunostimulatory therapeutic nucleic acid component specific for the treatment of the disorder in the subject and permitting the agent to be incorporated into a cell, whereby the disorder is effectively treated.
  • immunostimulatory therapeutic nucleic acid component may be delivered to the cells of the subject in vitro or in vivo.
  • the in vitro delivery of the immunostimulatory therapeutic nucleic acid component is carried out on cells that have been removed from an organism. The cells are returned to the body of the subject whereby the subject is treated.
  • in vivo delivery involves direct transduction of cells within the body of the subject to effect treatment.
  • Cationic lipid mediated delivery of vectors encoding therapeutic agents can thus provide therapy for genetic disease by supplying deficient or missing gene products to treat any disease in which the defective gene or its product has been identified, such as Duchenne's dystrophy (Kunkel, L. and Hoffman, E. Brit. Med. Bull. 45(3):630-643 (1989)) and cystic fibrosis (Goodfellow, P. Nature, 341(6238): 102-3 (1989)).
  • the cationic lipid mediated intracellular delivery described can also provide immunizing peptides.
  • the above transfection procedures may be applied by direct injection of cationic lipid formulations together with a vector coding for an immunogen into cells of an animal in vivo or transfection of cells of an animal in vitro with subsequent reintroduction of the transduced cells into the animal.
  • the ability to transfect cells with cationic lipids thus provides an alternate method for immunization.
  • the gene for an antigen is introduced, by means of cationic lipid-mediated delivery, into cells of an animal.
  • the transfected cells, expressing the antigen are reinjected into the animal or already reside within the animal, where the immune system can respond to the antigen.
  • the process can be enhanced by coadministration of either an adjuvant or cytokines such as lymphokines, or a gene coding for such adjuvants or cytokines or lymphokines, to further stimulate the lymphoid cells and other cells mediating the immune response.
  • an adjuvant or cytokines such as lymphokines
  • a gene coding for such adjuvants or cytokines or lymphokines to further stimulate the lymphoid cells and other cells mediating the immune response.
  • Administration to patients diagnosed with neoplastic disease of DNA liposome complexes for the treatment of neoplasia involves, preferably, intratumoral injection, by needle and syringe or by catheter (see infra), of the complexes.
  • Plasmid DNA in an amount ranging from about 0.1 microgram to about 5 g is administered in from about 0.15 nanoMolar to about 1.5 milliMolar liposome solution.
  • 0.1 ml of plasmid DNA (0.05-50 mg/ml) in lactated Ringer's solution is added to 0.1 ml of
  • DMRIE/DOPE liposome solution (0.15-15 microMolar), and 0.8 ml of lactated Ringer's solution is added to the liposome DNA solution.
  • three aliquots of 0.2 ml each are injected into a nodule or one aliquot of 0.6 ml is applied by catheter.
  • the patient in this preferred protocol, is thus administered a dose ranging from about 3 microgram to about 3 milligram of DNA and from about 4.5 nanoMolar to about 4.5 microMolar DMRIE/DOPE. Doses are repeated at two-week intervals.
  • a combination, or any component thereof, of the invention can be any combination, or any component thereof, of the invention.
  • immunotherapeutic compositions which may be administered to a subject by any route, such as a parenteral route (e.g., intratumoral injection, intravenous injection, intraarterial injection, subcutaneous injection or intramuscular injection).
  • parenteral route e.g., intratumoral injection, intravenous injection, intraarterial injection, subcutaneous injection or intramuscular injection.
  • the immunotherapeutic compositions of the invention comprises an antibody recognizing CTLA-4, PD-1, PD-Ll, PD-L2, CD40, OX40, CD137, GITR, ILT2, or ILT3, such a but not limited to ipilimumab in association with an immunostimulatory therapeutic nucleic acid component that expresses one or more alloantigens, such as but not limited to, Allovectin ® .
  • the immunotherapeutic composition of the present invention comprises a synergistic combinations of components that include a binding component and an immunostimulatory therapeutic nucleic acid component "in association" with one another.
  • the term "in association” indicates that the components of the immunotherapeutic compositions of the invention can be formulated into a single composition for simultaneous delivery or formulated separately into two or more compositions (e.g., a kit).
  • compositions including an antibody recognizing CTLA-4, PD-1, PD-Ll, PD-L2, CD40, OX40, CD137, GITR, ILT2, or ILT3 formulated for parenteral administration (e.g., intravenous) to a subject and an immunostimulatory therapeutic nucleic acid component formulated for parenteral administration (e.g., intratumoral).
  • parenteral administration e.g., intravenous
  • an immunostimulatory therapeutic nucleic acid component formulated for parenteral administration (e.g., intratumoral).
  • both components of the immunotherapeutic composition can be formulated, separately or together, for parenteral delivery.
  • Sterile injectable solutions can be prepared by incorporating an
  • immunotherapeutic composition of the invention or any component thereof e.g., binding component and/or immunostimulatory therapeutic nucleic acid component
  • an appropriate solvent optionally with one or a combination of ingredients enumerated above, as required, followed by sterilization microfiltration.
  • dispersions are prepared by incorporating the active ingredient (e.g., binding component and/or immunostimulatory therapeutic nucleic acid component) into a sterile vehicle that contains a basic dispersion medium and the required other ingredients from those enumerated above.
  • the preferred methods of preparation are vacuum drying and freeze-drying (lyophilization) that yield a powder of the active ingredient plus any additional, desired ingredient from a previously sterile-filtered solution thereof.
  • the immunotherapeutic composition of the invention or any component thereof may also be administered by inhalation.
  • a suitable immunotherapeutic composition for inhalation may be an aerosol.
  • composition for inhalation of the invention or any component thereof may include: an aerosol container with a capacity of 15-20 ml containing the active ingredient (e.g., binding component and/or chemotherapeutic agent), a lubricating agent, such as polysorbate 85 or oleic acid, dispersed in a propellant, such as freon, preferably in a combination of 1 ,2- dichlorotetrafluoro ethane and difluorochloromethane.
  • the composition is in an appropriate aerosol container adapted for either intranasal or oral inhalation administration. Dosage of the Immunotherapeutic Composition
  • the immunotherapeutic composition of the invention is N-(2-aminoethyl)-2-aminoethyl-N-(2-aminoethyl)-2-aminoethyl-N-(2-aminoethyl)-2-aminoethyl-N-(2-aminoethyl)-2-aminoethyl-N-(2-aminoethyl)-2-aminoe
  • a "therapeutically effective dosage” or "therapeutically effective amount” which preferably inhibits a disease or condition (e.g., tumor growth) to any extent- preferably by at least about 20%, more preferably by at least about 40%, even more preferably by at least about 60%, and still more preferably by at least about 80%- 100% relative to untreated subjects.
  • a disease or condition e.g., tumor growth
  • the ability of the immunotherapeutic composition of the present invention or any component thereof to inhibit cancer can be evaluated in an animal model system predictive of efficacy in human tumors. Alternatively, this property can be evaluated by examining the ability of the immunotherapeutic composition of the invention or any component thereof to inhibit tumor cell growth in vitro by assays well-known to the skilled practitioner.
  • One of ordinary skill in the art would be able to determine such amounts based on such factors as the subject's size, the severity of the subject's symptoms, and the particular composition or route of administration selected.
  • Dosage regimens may be adjusted to provide the optimum desired response
  • a dose may be administered, several divided doses may be administered over time or the dose may be proportionally reduced or increased as indicated by exigencies of the therapeutic situation. It is especially advantageous to formulate parenteral compositions in dosage unit form for ease of administration and uniformity of dosage. A physician or veterinarian having ordinary skill in the art can readily determine and prescribe the effective amount of the pharmaceutical composition required.
  • the physician or veterinarian could preferably start by administering the immunostimulatory therapeutic nucleic acid component first according to the preferred recommended dose and schedule which is weekly for six weeks followed by a rest period of two to three weeks followed by the administration of the antibody recognizing CTLA-4, PD- 1 , PD-L1 , PD-L2, CD40, OX40, CD 137, GITR, ILT2, or ILT3 according to the preferred recommended dose and schedule which is weekly for six weeks followed by a rest period of two to three weeks followed by the administration of the antibody recognizing CTLA-4, PD- 1 , PD-L1 , PD-L2, CD40, OX40, CD 137, GITR, ILT2, or ILT3 according to the
  • the separate components may be administered to a subject by the same or by a different route (e.g., intratumoral, orally, intravenously, intratumorally). If a patient is already receiving the binding component according to the prescribed regiment then the immunostimulatory therapeutic nucleic acid component would be added to the regiment.
  • IL-2 is given after the immunostimulatory therapeutic nucleic acid component and before antibodies recognizing CTLA-4, PD-1 , PD- Ll , PD-L2, CD40, OX40, CD137, GITR, ILT2, or ILT3 in order to optimize the opportunity for T cell activation and/or proliferation.
  • IL-2 and/or the immunostimulatory therapeutic nucleic acid component and/or antibodies recognizing CTLA-4, PD-1 , PD-L1 , PD-L2, CD40, OX40, CD 137, GITR, ILT2, or ILT3 could be delivered concurrently. This regiment would be beneficial when steroids are used.
  • subjects will receive intralesional injection(s) of
  • Allovectin® once a week for six consecutive weeks into a single lesion or into multiple lesions followed by three weeks of observation and evaluation. Subjects with stable or responding disease will receive additional cycles starting on Weeks 9, 17, 25, etc., until disease progression, complete response or unacceptable toxicity. The maximum number of cycles before surgery for the subjects with stable or responding disease will be six at the discretion of the investigator.
  • Allovectin® neoadjuvant treatment patients will undergo complete surgical resection, followed with adjuvant interferon treatment. Patients will receive standard outpatient induction therapy (IFN-a-2b 20 million units/m per day intravenously [IV] 5 days per week) for 4 weeks, followed by standard outpatient maintenance therapy (10 million units/m , subcutaneously [SC], 3 times per week), administered for 48 weeks.
  • IFN-a-2b 20 million units/m per day intravenously [IV] 5 days per week
  • IV intravenously
  • SC subcutaneously
  • Safety assessments will include vital signs, clinical laboratory tests, physical examinations, adverse events monitoring, and review of concomitant medication usage.
  • the effectiveness of the immunotherapeutic composition of the present invention can be determined, for example, by determining whether a tumor being treated in the subject shrinks or ceases to grow.
  • the size of tumor can be easily determined, for example, by X-ray, magnetic resonance imaging (MRI) or visually in a surgical procedure.
  • MRI magnetic resonance imaging
  • a suitable daily dose of the immunotherapeutic composition of the invention thereof may be that amount which is the lowest dose effective to produce a therapeutic effect. Such an effective dose will generally depend upon the factors described above. It is preferred that administration be by injection, preferably proximal to the site of the target (e.g., tumor). If desired, a therapeutically effective daily dose of the target.
  • immunotherapeutic composition of the present invention hereof may be administered as two, three, four, five, six or more sub-doses administered separately at appropriate intervals throughout the day.
  • chemotherapeutic agent is as set forth in the Physicians' Desk Reference 2003 (Thomson Healthcare; 57 th edition (Nov. 1 , 2002)) which is herein incorporated by reference.
  • kits including the components of the compositions of the invention in kit form.
  • a kit of the present invention includes one or more components including, but not limited to, a binding component, as discussed herein, which specifically binds CTLA-4, PD-1 , PD-L1 , PD-L2, CD40, OX40, CD137, GITR, ILT2, or ILT3 in association with one or more additional components including, but not limited to, an immunostimulatory therapeutic nucleic acid component, as discussed herein.
  • the binding component and/or the immunostimulatory therapeutic nucleic acid component can be formulated as a pure composition or in combination with a pharmaceutically acceptable carrier, in an immunotherapeutic composition.
  • a kit includes a binding component of the invention (e.g., an anti-CTLA-4 antibody, such as ipilimumab, or an antibody recognizing PD-1 , PD-L1 , PD- L2, CD40, OX40, CD 137, GITR, ILT2, or ILT3) and an immunostimulatory therapeutic nucleic acid component thereof in another container (e.g., in a sterile glass or plastic vial).
  • a binding component of the invention e.g., an anti-CTLA-4 antibody, such as ipilimumab, or an antibody recognizing PD-1 , PD-L1 , PD- L2, CD40, OX40, CD 137, GITR, ILT2, or ILT3
  • an immunostimulatory therapeutic nucleic acid component thereof e.g., in a sterile glass or plastic vial.
  • the kit comprises a composition of the invention, including a binding component (e.g., anti-CTLA-4 antibody, such as ipilimumab, or an antibody recognizing PD-1, PD-L1, PD-L2, CD40, OX40, CD137, GITR, ILT2, or ILT3) along with an immunostimulatory therapeutic nucleic acid component such as Allovectin ® formulated together, optionally, along with a pharmaceutically acceptable carrier, in an immunotherapeutic composition, in a single, common container.
  • a binding component e.g., anti-CTLA-4 antibody, such as ipilimumab, or an antibody recognizing PD-1, PD-L1, PD-L2, CD40, OX40, CD137, GITR, ILT2, or ILT3
  • an immunostimulatory therapeutic nucleic acid component such as Allovectin ® formulated together, optionally, along with a pharmaceutically acceptable carrier, in an immunotherapeutic composition, in a single,
  • the kit can include a device for performing such administration.
  • the kit can include one or more hypodermic needles or other injection devices as discussed above.
  • the kit can include a package insert including information concerning the immunotherapeutic compositions or individual component and dosage forms in the kit.
  • immunotherapeutic compositions and dosage forms effectively and safely.
  • the following information regarding the immunotherapeutic composition of the invention may be supplied in the insert: pharmacokinetics, pharmacodynamics, clinical studies, efficacy parameters, indications and usage, contraindications, warnings, precautions, adverse reactions, overdosage, proper dosage and administration, how supplied, proper storage conditions, references, manufacturer/distributor information and patent information.
  • Allovectin® would first act to generate a tumor-reactive T cell repertoire.
  • Antibodies recognizing CTLA-4, PD-1, PD-L1, PD-L2, CD40, OX40, CD 137, GITR, ILT2, or ILT3 would then serve to maximally activate these cell populations.
  • a murine melanoma model was used in the disclosed studies.
  • VCL-1005, DMRIE/DOPE, and Allovectin ® were prepared by Vical
  • the bicistronic plasmid VCL-1005 (encoding human HLA-B7 heavy chain and chimpanzee ⁇ 2 -microglobulin) was formulated at 2 mg/mL in IVF-1 vehicle (0.9% saline containing 10 ⁇ /mL glycerin), the lipids DMRIE and DOPE was mixed at a 1 : 1 molar ratio and adjusted to a total lipid concentration of 0.86 mg/mL in IVF-1, and Allovectin ® was prepared as 2 mg/mL VCL-1005 formulated with 0.86 mg/mL DMRIE/DOPE in TVF-1.
  • Hamster anti-murine-CTLA-4 (clone 9H10) and an isotype-matched control hamster IgG (clone SHG-1) were purchased as 1 mg/mL, azide-free solutions (BioLegend, San Diego, CA).
  • mice were maintained as exponentially growing cultures in RPMI-1640 medium containing 10% fetal bovine serum, and for implantation were harvested during log phase growth and resuspended in phosphate buffered saline (PBS).
  • PBS phosphate buffered saline
  • Treatment groups were: no treatment (control), Allovectin® (100 ⁇ g) plus
  • Allovectin ® , VCL-1005 and DMRIE/DOPE were delivered intratumorally (i.t.) as 50 volumes daily on Days 1-4 (qdx4).
  • Antibodies (SHG-1 and 9H10) were delivered intraperitoneally (i.p.) as 100 ⁇ g on Day 1 and thereafter every 3 days (q3d) as 50 ⁇ g. Tumor dimensions were measured with calipers every three days, and tumor volume
  • Allovectin ® plus anti-CTLA-4 group was less than the sum of the corresponding effects of either treatment alone, tumor volume slope was used. This endpoint can be computed for each animal using the available tumor measurements, and does not require that the number and spacing of measurements be identical for all mice.
  • compositions and methods contemplates particular embodiments in which the composition or method consists essentially of or consists of those elements or steps.
  • Anti-tumor activity may be confirmed using a study with the following or similar design. Solid B16-F10 tumors are established on the flank of C57/BL6 or B6D2F1 mice, and when tumors are palpable and approximately 100 mm in volume, animals are randomized to treatment groups. Treatment groups include: anti-PD-1, anti-PD-Ll,
  • Allovectin plus normal IgG or an irrelevant antibody
  • Allovectin plus anti-PD-1 Allovectin plus anti-PD-Ll
  • non-treated tumor-bearing mice as controls.
  • Allovectin is delivered by intratumoral injection as a 100 ⁇ g dose for four consecutive days (100 ⁇ g qdx4), and antibodies are delivered by intraperitoneal injection as 200 ⁇ g doses every 3 days until study end (200 ⁇ g q3d).
  • Antibodies are reactive with mouse PD-1 or PD-L1, such as the rat monoclonal antibodies RPMl-14 and 10F.9G2, respectively. Animals are followed for tumor volume (measured every 3 days using calipers) and survival; mean tumor volume slopes are compared between groups using a one-way ANOVA analysis, and survivals are compared by the log-rank test.

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Abstract

La présente invention concerne des combinaisons immunothérapeutiques et des méthodes de traitement d'affections médicales caractérisées par un défaut de réponse immunitaire efficace, par exemple comme cela serait le cas suite à une régulation à la baisse du complexe majeur d'histocompatibilité de classe I, par exemple en présence d'un cancer. Les compositions immunothérapeutiques de l'invention, qui peuvent être utilisées en vue du traitement d'affections médicales, contiennent un ou plusieurs anticorps ou molécules immunostimulants présentant une spécificité pour CTLA-4, PD-1, PD-L1, PD-L2, CD40, OX40, CD137, GITR, ILT2 ou ILT3, ou des ligands pour ces molécules (par exemple un anticorps monoclonal entièrement humain isolé) en association avec un ou plusieurs alloantigènes, tels que un ou des vecteurs capables d'exprimer une ou des protéines ou un ou des peptides capables de stimuler l'immunité faisant appel aux lymphocytes T contre des tissus ou des cellules, formulés dans un excipient pharmaceutiquement acceptable. Les protéines ou peptides peuvent comprendre des antigènes du complexe majeur d'histocompatibilité de classe I, des 2-microglobulines ou des cytokines. L'antigène du système majeur d'histocompatibilité peut être étranger au sujet et il peut s'agir de HLA-B7.
PCT/US2012/055864 2011-09-20 2012-09-18 Immunothérapie combinée à action antitumorale synergique faisant appel à des alloantigènes Ceased WO2013043569A1 (fr)

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